Method of adaptive load control in electrical supply system of data processing center
SUBSTANCE: according to the method, the value of nominal averaged power consumption is set and stored - Pnom, after which for the timepoint ti the value of the total averaged power Pifull=Pic+Pie+Pia, where Pic is power consumption by computer equipment, Pie - power consumption by engineering equipment, Pia - power consumption by additional equipment, then the deviation of the total averaged current power consumption from the nominal average power consumption is calculated and stored ΔPi=Pifull-Pnom, then for the timepoint ti+1=ti+tP, where tP is the load adjustment period is calculated and stored, the deviation of the total averaged current power consumption from the nominal averaged power consumption ΔPi+1=Pi+1full-Pnom, then after exceeding the deviation values in absolute value |ΔPi|≥ΔPad and |ΔPi+1|≥ΔPad from a given permissible tolerance ΔPad the increment of deviation is calculated and the performance of the computing equipment is changed in such a way that the current total averaged power consumption Pl+1full at negative or positive values ΔPi+1 and respectively increased or decreased by their values in such a way that the total averaged power in the next period Pi+2full would correspond to the nominal averaged power consumption Pnom.
EFFECT: increasing the accuracy and stability of maintaining the specified nominal power consumption of data processing center, reducing the required number of power measurements.
FIELD: measurement equipment.
SUBSTANCE: invention is used in the field of power engineering. According to the method each value measured using the vector measuring instrument, is bound to a reference value with generation of the normalised measured value, for each measured value the threshold indicating value is assigned, starting from which a critical state of the power network occurs in the respective location of measurements, each threshold value is bound to the reference value with generation of normalised threshold value, from each normalised threshold value and related normalised measured value, the normalised difference value is determined, the normalised difference values with coinciding time stamps are statistically processed, on the basis of the statistical result a state function is formed, which is displayed in the device (12) of the power network control centre.
EFFECT: simplification and improvement of reliability of the method in case of large number of measurement location in a power network.
12 cl, 5 dwg
SUBSTANCE: device includes a control unit, which input is connected to input current of the switchgear busbar section, and the first, second and third timers with actuating units. Output of the maximum current control unit is connected to the first, second and third timers, at that output of the first timer is connected to the first, second and third actuating units and alarm module, output of the second timer is connected to the fourth actuating unit and output of the third timer is connected to the fourth actuating unit, at that the first, second and third actuating units are outputs of the first step of power loss protection, which act to switch off electric drives of the rotary table, drilling mud pump and top drive system, while the fourth actuating unit is an output of the second step of power loss protection, which acts to switch off the drawwork electric drive, at that the fifth actuating unit is an output of the third step of power loss protection, which acts to switch off the disconnect switch of the switchgear busbar section.
EFFECT: improving protection reliability and efficiency.
SUBSTANCE: invention relates to electrical engineering, particularly, to emergency control. In the claimed method that considers power flow cross-effects for the network components by impact on the electrical devices capable to regulate their longitudinal resistance the complex system is divided into aggregates of controlled and uncontrolled subsystems creating minimum cross-effect, at that control of the components overloading is made cyclically and separately for each subsystem, automatic equipment for each subsystem controls the current mode, and in case of overloading calculation of control actions is made by solving the linear task of optimization, overloading of the network components is prevented by issue of data on control actions to the devices capable to regulate their longitudinal resistance.
EFFECT: solving tasks of automated distributed control to unload network components of the power pool system, redistribution of power flows in the power pool system is fundamental for the suggested method in order to decrease loading of the overloaded components.
SUBSTANCE: voltage stabilisation system contains a transformer substation and an aerial transmission line with power supply branch lines, three independent voltage adders at each of the phase lines installed at the end of the last line, at that the voltage adder is made as a bridge circuit, two parallel interconnected branch lines, which consist of in-series accumulating LC delay line and bidirectional transistor-based commutator, in the bridge circuit diagonal there is an installed bidirectional triode thyristor, accumulating LC delay lines of the bridge circuit branches are connected to phase and zero wires respectively.
EFFECT: stabilisation of the network voltage along the whole line of the power transmission line at variable load of the consumers connected to it.
2 cl, 6 dwg
SUBSTANCE: invention is related to the field of electric engineering and, in particular, to control of pump units and can be used for alternate control of three- and one-phase loads through the power four-wire mains. The device contains at the power line input a protective device, a three-phase solenoid starter connected to the three-phase load connected at the line end and three wye-connected capacitors with an artificial earthing point are connected to the outputs of the starter; at the line beginning there is an ambient temperature sensor connected to a one-phase solenoid starter which contact is connected in parallel to one phase of the three-phase solenoid starter and at the line ending there is a heater switched on between a neutral wire and the artificial earthing point of three capacitors.
EFFECT: possibility of skipping control cable during layout, refusal from switching devices in harmful environment.
SUBSTANCE: device includes a block of correlation devices for each generator, which includes the first and the second sensors that are connected to terminals of a synchronous generator, the first and the second correlation devices determining coefficients of mutual correlation of the effective value of voltage and reactive power, the first inputs of which are connected to the output of the first sensor, the second input of the first correlation device is connected to the output of the second sensor, a time delay unit the input of which is connected to the output of the second sensor as well, and the output is connected to the second input of the second correlation device, and an analysing device to the inputs of which there connected are outputs of the first and the second correlation devices of blocks of correlation devices of all the generators; besides, a signal at the output of the analysing device appears in case one of the synchronous generators is a source of synchronous vibrations in a power system or intercomputer vibrations in the group of generators of one thermal power plant.
EFFECT: providing the possibility of detecting a source of appearance of synchronous vibrations.
2 cl, 5 dwg
SUBSTANCE: method consists in measurement of voltage, active and reactive power on buses of the station, control of available alarms from a stationary automatics of the generator "imitation of current overload of a rotor" and if they are available from all generators connected to buses of the station, then trip of load of the controlled power district is performed with accurate determination of unloading volume, which is calculated as per the following formula:
EFFECT: elimination of a deficit of reactive power in the power district and prevention of avalanching voltage reduction.
SUBSTANCE: device to protect equipment of a power AC system comprises the first facility (15), configured with the possibility to measure frequency of current and voltage in at least one location (16) in the power system along an interconnection between two abstract electric machines of an equivalent two-machine system. The fourth facility (19) configured as capable of using the values of frequency of the measured current and voltage to determine whether there is power oscillation in the power system, and if the power oscillation has been determined, to determine whether the location (16) of measurement is at the side of the electric motor or the side of the generator of a potential electric centre of pole slipping along the interconnection. Besides, the electric centre is determined as the location, when the voltage becomes zero during pole slipping, and sending this information additionally into the third facility (20) for use in control for protection of equipment of the power system.
EFFECT: improved reliability.
19 cl, 12 dwg
SUBSTANCE: device for power supply of a long stator winding (1) with several sections (2) contains a power supply source, a power line (6) connected to the power supply source, switches (3) of sections related to the power line (6) and having an output for connection with respective winding section used for compensation of reactive power notwithstanding power control and device for reactive power compensation in which impedance of the device can be set.
EFFECT: providing compensation of reactive power notwithstanding control of the power supply source.
3 cl, 4 dwg
FIELD: electrical engineering.
SUBSTANCE: by way of preliminary analysis, a complex power pool grid is split into subsystems with minimum mutual impact. For each subsystem being controlled, based on the assumed splitting, one forms databases of sensibility factors and maximally allowed active power flows through links for different types of topology and accidental agitations. All the load lines and nodes of each subsystem being controlled are equipped with link agents and load agents. When any link is overloaded within the subsystem being controlled, such link agent, proceeding from information on the grid current topology and by way of linear optimisation tasks solution and by way of exchange of massages between link agents and load agents, calculates and implements the optimal control action vector. The algorithm keeps being executed until elimination of overloads with all the links within the subsystem being controlled or until any optimisation task being solved within the automation means operation cycle has a solution.
EFFECT: reliability improvement.
SUBSTANCE: additional electric heater connected to diagonal of the three-phase diode bridge, and the second key the control input of which is connected to the second output of the control system, are offered, meanwhile the additional electric heater is formed by two series connected electric heating elements, parallel to one of which the second key is connected, and the control system is implemented with a possibility of formation of control impulses at the first and second outputs and during decrease of voltage of alternate control of their duration from zero up to the switching period, and at first at the second output at change of control signal at its input from the maximum negative value down to zero, and then at the first output at change of control signal at its input from zero up to the maximum positive value.
EFFECT: rational energy consumption due to improvement of quality of voltage and current at the input and output of transformer substations and decrease in this regard of losses of power transformers and in networks, improvement of shape of supply voltage of consumers and improvement of accuracy and speed of its maintenance at the set level due to essential reduction of depth of modulation of added voltage.
2 cl, 1 dwg
FIELD: physics, control.
SUBSTANCE: invention relates to a central device (110) for a control system (100) for controlling an energy transmission system (10), having energy generators (30-32) and energy consumers (40-45), wherein the central device is configured, based on the current and/or forecast energy consumption, to determine the amount of energy to generated by the energy generators. According to the invention, at least one partial group (T1, T2, T3) of energy consumers connected to the energy transmission system is allocated a separate energy bandwidth (E1±ΔE1, E2±ΔE2, E3±ΔE3) which indicates how much total energy consumption of the partial group can be increased and/or reduced, and the central device is configured, based on the energy generation mode of the energy generators and separate bandwidths of the partial group, to determine optimum given energy consumption (Es1, Es2, Es3) lying within the separate energy bandwidth which the partial group should achieve overall, and generate a control signal indicating the given energy consumption.
EFFECT: facilitating load balancing.
10 cl, 2 dwg
SUBSTANCE: voltage stabiliser at the plant's transformer substations is referred to electric engineering, in particular, to electric energy systems, and may be used for stabilisation of voltage for transformer substation consumers at industrial and agricultural facilities where electric heaters are envisaged for auxiliary heating of the premises, water, etc., as well as production facilities of beef, dairy and food industries where continuous delivery of steam is required for technological processes. The three-phase voltage stabiliser comprises a booster transformer and two three-phase keys with common control system. Primary windings of power transformers at the main and auxiliary plant's substations are connected to the network through the primary winding of the booster transformer, secondary windings of power transformers at these substations are connected to the plant's consumers, the secondary winding of the booster transformer is coupled by its one outputs to the auxiliary electric heater and the first three-phase key and by its other outputs to the secondary winding of the power transformer at the auxiliary substation intended for the plant's auxiliaries and the main electric heater is connected to it. The auxiliary electric heater is made of two series heating elements with the second three-phase key connected to their connection points, the control system is made to generate control pulses for the first and second three-phase keys and sequential regulation of their duration from the commutating period up to zero, at that for the first key when control signal is changed from positive value up to zero and then for the second key when control signal is changed from zero up to negative value, at that the control signal is delivered to the control system from input of the output voltage deviation sensor at the main substation feeding the most crucial consumers of the plant.
EFFECT: sound energy management in result of improved quality of voltage and current at input and output of the transformer substations and reduction of the associated losses, as well as improved shape of voltage for consumers and improved accuracy and speed of its maintenance at the preset level in result of essential decrease in depth of boost voltage modulation.
4 cl, 1 dwg
SUBSTANCE: invention relates to the method and device to control an electric system for supply of electric current to sockets for aircraft passengers. The method includes the following stages: setting the maximum electric current fed to sockets; cyclic detection of electric current consumed by sockets; if electric current consumed by sockets is higher than the maximum electric current, disconnection of one or more sockets from power supply, until the electric current consumed by sockets does not become lower than the maximum electric current; if electric current consumed by sockets is much lower than the maximum electric current, repeated connection of one or more sockets to power supply, until the electric current consumed by sockets does not become closer to the maximum electric current; and periodical variation of sockets connected/disconnected from power supply, so that each socket is connected to power supply within the first period of time (Ton) and is disconnected from power supply within the second period of time (Toff).
EFFECT: technical result consists in provision of possibility to supply to large number of loads under conditions of restricted electric power.
13 cl, 5 dwg
SUBSTANCE: invention relates to a power supply network which comprises: a measuring device which performs two-way communication with a power source and measures and displays information on power in real time; and an electric power control device which is connected to the measuring device and supplies home appliances with electric power based on the information on power provided from outside. The invention is therefore charged by a power supply, having information at a relatively low cost, and is selectively associated with home appliances so that charged electricity can be used as a source of operating power. According to the invention, home appliances can be used at a lower cost.
EFFECT: reducing loss of electric power and environmental pollution when generating electric power.
15 cl, 10 dwg
SUBSTANCE: apparatus for limiting power consumption consists of a controlled unit, having: an input line, an output line, a current sensor situated at the electrical entrance of a building or room, a threshold device, a logic processor, a remote control command transmitter, indicator LEDs, and one or more inverter units located at points of connection of terminal loads to an internal electric grid, each having: an input line, a load switch, an accumulator, a charging device, an inverter, a control circuit, a remote control command receiver, wherein interaction of the control unit with the inverter units takes place through remote control commands.
EFFECT: enabling connection of equipment which exceeds the limit of the installed power without upgrading the electric grid.
13 cl, 8 dwg
SUBSTANCE: energy consuming device have the possibility of being operated in the range of values of physical parameter, which is restricted with minimum and maximum values of physical parameter. With that, commands are received from a control device either to decrease energy consumption, or to increase energy consumption, and energy consumption is decreased or increased by changing the value of physical parameter so that each energy consuming device operating in the mode of increase of its physical parameter value receives a command to decrease energy consumption and stops increasing the value of its physical parameter, and each energy consuming device operating in the mode of decrease of its physical parameter value receives a command to increase energy consumption and starts increasing its physical parameter.
EFFECT: smoothing of pulsations in a municipal electric network.
9 cl, 7 dwg
SUBSTANCE: voltage control and conservation (VCC) system comprises three subsystems that include a system of energy delivery (ED), a system of energy control (EC) and a system of energy regulation (ER). The system (VCC) is configured as capable of tracking energy consumption in the ED system and to define one or several parameters of energy delivery in the EC system. The EC system may then transmit one or several parameters of energy delivery into the ER system to regulate energy delivered to multiple locations of loads, for maximum power saving.
EFFECT: provision of energy conservation using a developed infrastructure and centralised control of substation voltage.
38 cl, 17 dwg
SUBSTANCE: invention is used in the field of power engineering. According to the method of identification of information on topology of the electric low-voltage distributing mains (10) a group is selected which contains at least two current measurement devices (17a-17e, 16a-16h) installed in various places of the low-voltage distributing mains (10). By means of the current measurement devices (17a-17e, 16a-16h) the current is measured with obtaining of the measured current value. The measured current values are summarized taking into account the direction of current with obtaining of the sum of currents, and the topology information is formed which specifies that current measuring devices (17a-17e, 16a-16h) electrically delimit the section of the low-voltage distributing mains (10) without loads and sources, if the sum of currents by value is below the set threshold.
EFFECT: enhancing reliability and functionality of mains.
22 cl, 3 dwg